<template>
	<picker @change="bindPickerChange" @columnchange="columnchange" :range="array" range-key="name" :value="value" mode="multiSelector">
		<slot></slot>
	</picker>
</template>

<script>
    let selectVal = ['','','']
    export default {
		props:{
			AllAddress:{
				type:Array,
				required:true
			}
		},
        data() {
            return{
                value: [0,0,0],
                array: [],
                index: 0,
            }
        },
		watch:{
			AllAddress:{
				immediate:true,
				deep:true,
				handler(){
					this.initSelect()
				}
			}
		},
        /* created() {
            this.initSelect()
        }, */
        methods:{
            // 初始化地址选项
            initSelect() {
                this.updateSourceDate() // 更新源数据
                .updateAddressDate() // 更新结果数据
                .$forceUpdate()  // 触发双向绑定
            },
            // 地址控件改变控件
            columnchange(d) {
                this.updateSelectIndex(d.detail.column, d.detail.value) // 更新选择索引
                .updateSourceDate() // 更新源数据
                .updateAddressDate() // 更新结果数据
                .$forceUpdate()  // 触发双向绑定
            },
            
            /**
             * 更新源数据
             * */
            updateSourceDate() {
                this.array = []
                this.array[0] = this.AllAddress.map(obj => {
                    return {
                        name: obj.label
                    }
                })
                this.array[1] = this.AllAddress[this.value[0]].children.map(obj => {
                    return {
                        name: obj.label
                    }
                })
                this.array[2] = this.AllAddress[this.value[0]].children[this.value[1]].children.map(obj => { 
                    return {
                        name: obj.label
                    }
                })
                return this
            },
            
            /**
             * 更新索引
             * */
            updateSelectIndex(column, value){
                let arr = JSON.parse(JSON.stringify(this.value)) 
                arr[column] = value
                if(column === 0 ) {
                    arr[1] = 0
                    arr[2] = 0
                }
                if(column === 1 ) {
                    arr[2] = 0
                }
                this.value = arr
                return this
            },
            
            /**
             * 更新结果数据 
             * */
            updateAddressDate() {
                selectVal[0] = this.array[0][this.value[0]].name
                selectVal[1] = this.array[1][this.value[1]].name 
                selectVal[2] = this.array[2][this.value[2]].name 
                return this
            },
            
            /**
             * 点击确定
             * */
            bindPickerChange(e) {
                this.$emit('change', {
                    index: this.value,
                    data: selectVal
                })
                return this
            }
            
        }
    }
</script>

<style>
</style>


